Shell Wax is a wax glue that SpongeBob to clean Gary's shell in the episode "Karate Island."
It comes in a small orange and yellow bottle. It has an illustration of a snail who looks similar to Gary on it. In dark green text, the bottle reads the product's name in capital letters.
Role in episode
SpongeBob douses himself in the wax. He then rubs his back all over Gary's shell. When he finishes, his back is completely burned away.